来自《耶鲁大学开放课程：生物医学工程探索 第6集 第6集》

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  to form another stem cell.
  从而生成另一个干细胞了
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  It's gone down a path towards maturation
  它在分化成熟的道路上越走越远
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  that's very difficult to go back up.
  覆水难收了
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  So there's a loss of potential in this division.
  因此 在分化中祖细胞损失了些潜能
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  This stem cell which is reproduced
  新生成的干细胞
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  still has the potential to undergo asymmetric division
  仍然有潜能进行不对称分裂
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  but this one does not.
  但定向祖细胞就不行
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  One sort of, might be kind of simple minded,
  有一种观点 虽然有些通俗
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  but one way to think about potential
  但不失为一种理解潜能的方法
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  is with the kind of potential that we all experience
  是说和我们从新生儿长大到成人
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  as we develop from newborns to adults,
  所具有的潜能类似
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  that a newborn child has lots of different potential.
  新生儿有很多潜能